<?php   
/*  
 */
class Application
{
 /**保存共享变量的文件*/
 var $save_file    = 'Application/Application';
 /**共享变量的名称*/
 var $application  = null;
 /**序列化之后的数据*/
  var $app_data    = '';
  /**是否已经做过setValue的操作防止频繁写文件操作*/
  var $__writed    = false;
 
  /**
   * 构造函数
   */
  function Application()
  {
   $this->application = array();
  }
  /**
   * 设置全局变量
   * @param string $var_name 要加入到全局变量的变量名
   * @param string $var_value 变量的值
   */
  function setValue($var_name,$var_value)
  {
   if (!is_string($var_name) || empty($var_name))
    return false;
   if ($this->__writed)
   {
    $this->application[$var_name] = $var_value;
    return;
   }
   $this->application = $this->getValue();
   if (!is_array($this->application))
    settype($this->application,"array");
   $this->application[$var_name] = $var_value;
   $this->__writed = true;
      $this->app_data = @serialize($this->application);   
      $this->__writeToFile();
  }
 /**
  * 取得保存在全局变量里的值
  * @return array
  */
 function getValue()
 {
     if (!is_file($this->save_file))
         $this->__writeToFile();
     return @unserialize(@file_get_contents($this->save_file));
 }
 /**
  * 写序列化后的数据到文件
  * @scope private
  */
 function __writeToFile()
 {
  $fp = @fopen($this->save_file,"w");
  @fwrite($fp,$this->app_data);
  @fclose($fp);
 }
}
?>

